The following species of true water bugs are the most common. Their population numbers vary considerably as water bugs are also preyed on by other species such as fish and birds. Water bugs are found all around the world. Habitat and DistributionĪll water bugs live next to water sources such as lakes, streams, and rivers. Preferred prey includes small fish, amphibians, and other invertebrates that live in the water. Water bugs have a varied diet, mostly based on aquatic types of prey. While most can swim, some of them can also submerge in the water looking for food. Water bugs are adapted to aquatic and terrestrial environments. Most water bugs have a flattened body shape, similar to regular cockroaches found inside the house. They have a round elongated body with 3 pairs of legs, and antennae. What do Water Bugs Look Like Giant water bug The species has a dark brown to black appearance, somewhat resembling the American cockroach. Oriental cockroaches are sometimes seen as the main example of water bugs. Water bugs have a different appearance depending on the species. These adaptations allow water bugs to move quickly and efficiently on water. There are species of water bugs that look exactly like cockroaches and species that have adapted feet that look like paddles. Some types of true water bugs live in the water.